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US 6,586,646 B1Granted
Vinylidene-containing polymers and uses thereof
AssigneePennzoil-Quaker State Company
InventorsWilliam J. Heilman, I-Ching Chiu, Wei Song, James C. W. Chien
Life of this patent
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Abstract
Various vinylidene-containing polymers are obtained in the presence of a single-site catalyst. For example, the polymers include ethylene/isobutene copolymer, ethylene/propylene/isobutene terpolymer, ethylene/styrene/isobutene terpolymer, ethylene/α-methyl-styrene/isobutene terpolymer, propylene/isobutene copolymer, styrene/isobutene copolymer, and α-methyl-styrene/isobutene copolymer. These polymers may be used to formulate lubricant oils.
Claims21
A copolymer comprising:
- polymerization units of an ethylene monomer and a vinylidene olefin monomer, wherein the polymer has a polymeric chain that includes a repeating unit of and at least one unit of;
- wherein E represents the ethylene monomer, and V represents the vinylidene olefin monomer, and wherein the polymer has a molecular weight <10,000.
A method of making a lubricant oil, comprising:
- mixing a copolymer of ethylene and a vinylidene olefin with an additive,
- wherein the copolymer includes a chain segment that has at least one diad derived from the vinylidene olefin, and wherein the copolymer has a molecular weight <10,000.
A lubricant comprising:
- a copolymer comprising polymerization units of an ethylene monomer and a vinylidene olefin monomer,
- wherein the polymer has a polymeric chain that includes a repeating unit of and at least one unit of;
- wherein E represents the ethylene monomer, and V represents the vinylidene olefin monomer,
- and wherein the polymer has a molecular weight <10,000.
1 more element
Dependencies are inferred from the claim text.